﻿#region Copyright and License Notice
// Copyright (C)2010-2016 - Rob Levine and other contributors
// http://configgen.codeplex.com
// 
// This file is part of ConfigGen.
// 
// ConfigGen is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// ConfigGen is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License and 
// the GNU Lesser General Public License along with ConfigGen.  
// If not, see <http://www.gnu.org/licenses/>
#endregion

using System;
using System.Collections.Generic;
using ConfigGen.Core.ConfigurationSettings;
using ConfigGen.Core.TokenHandling;
using NUnit.Framework;

namespace ConfigGen.Core.Tests.TokenHandling
{
    [TestFixture]
    public class TokenReplacerTests
    {
        [Test]
        public void Initialise001_NullSettingsThrows()
        {
            var tokenReplacer = new TokenReplacer();
            Assert.Throws<ArgumentNullException>(() => tokenReplacer.Initialise(null));
        }

        [Test]
        public void Initialise002_CalledTwiceThrows()
        {
            var tokenReplacer = new TokenReplacer();
            var machineConfig = new MachineConfigurationSettings("machineName", "configFilePath", new ConfigurationSetting[0]);
            tokenReplacer.Initialise(machineConfig);
            Assert.Throws<InvalidOperationException>(() => tokenReplacer.Initialise(machineConfig));
        }

        [Test]
        public void GetTokenValue001_TokenExists()
        {
            var machineSettings = new MachineConfigurationSettings("machineName", "configFilePath",
                                                      new List<ConfigurationSetting> {new ConfigurationSetting("token1", "value1")});
            var tokenReplacer = new TokenReplacer();
            tokenReplacer.Initialise(machineSettings);
            var ret = tokenReplacer.GetTokenValue("token1");
            Assert.IsNotNull(ret, "Non-null return vaue expected.");
            Assert.AreEqual("value1", ret, "Incorrect token value");
        }

        [Test]
        public void GetTokenValue002_TokenDoesNotExist()
        {
            var machineSettings = new MachineConfigurationSettings("machineName", "configFilePath",
                                          new List<ConfigurationSetting> { new ConfigurationSetting("token1", "value1") });

            var tokenReplacer = new TokenReplacer();
            tokenReplacer.Initialise(machineSettings);
            Assert.Throws<NoMatchingTokenException>(()=>tokenReplacer.GetTokenValue("token2"));
        }

        [Test]
        public void GetTokenValue003_InitialiseNotCalledFirstThrows()
        {
            var tokenReplacer = new TokenReplacer();
            Assert.Throws<InvalidOperationException>(() => tokenReplacer.GetTokenValue("token2"));
        }
    }
}
